40315 ÷ 8 = 5039 R3
Let's divide 40315 by 8.

Step 1:
8 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 4 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 8

Step 2:
8 goes into 40 5 times with a remainder of 0.
Write down 5 as next digit of of the result. 
Result so far: 5
Subtract 40 from 40 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 8

Step 3:
8 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of of the result. 
Result so far: 50
Subtract 0 from 3 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 8

Step 4:
8 goes into 31 3 times with a remainder of 7.
Write down 3 as next digit of of the result. 
Result so far: 503
Subtract 24 from 31 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 8

Step 5:
8 goes into 75 9 times with a remainder of 3.
Write down 9 as next digit of of the result. 
Result so far: 5039
Subtract 72 from 75 to get 3.

The final result is 5039 with a remainder of 3.